Female reproductive cycle might get disrupted by
Malnourishment & emotional stress
Environmental factors & emotional stress
Females typically continue to have menstrual cycles starting from puberty, throughout their lives, until menopause occurs between the ages of 40 and 60.
The menstrual phase is the first phase of the menstrual cycle during which the lining of the uterus, called the endometrium, is shed as menstrual flow out of the cervix and vagina. Factors such as malnourishment, travelling across time zones and emotional stress can disrupt the cycle.